package util;

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @description: 数据库JDBC
 * @author: chengbaiyi
 * @create: 2022-05-15 14:15
 */
public class DBUtils {
    private static volatile MysqlDataSource mysqlDataSource;

    public static MysqlDataSource getMysqlDataSource() {
        if (mysqlDataSource == null) {
            synchronized (DBUtils.class) {
                if (mysqlDataSource == null) {
                    mysqlDataSource = new MysqlDataSource();
//                    mysqlDataSource.setURL("jdbc:mysql://127.0.0.1:3306/myblog?characterEncoding=utf8&useSSL=true");
                    mysqlDataSource.setURL("jdbc:mysql://127.0.0.1:3306/myblog?characterEncoding=utf8&useSSL=false");
                    mysqlDataSource.setUser("root");
                    mysqlDataSource.setPassword("12345678");
                }
            }
        }
        return mysqlDataSource;
    }

    public static Connection getConnection() throws SQLException {
        return getMysqlDataSource().getConnection();
    }

    public static void close(ResultSet resultSet, PreparedStatement statement, Connection connection) throws SQLException {
        if (resultSet != null) resultSet.close();
        if (statement != null) statement.close();
        if (connection != null) connection.close();
    }
}
